Synthetic aperture sonar

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Synthetic aperture sonar (SAS) is a form of sonar in which sophisticated post-processing of sonar data are used in ways closely analogous to synthetic aperture radar. Synthetic aperture sonars combine a number of acoustic pings to form an image with much higher resolution than conventional sonars, typically 10 times higher. The principle of synthetic aperture sonar is to move a sonar along a line and illuminate the same spot on the sea floor with several pings. This produces a synthetic array equal to the distance traveled. By coherent reorganization of the data from all the pings, a synthetic aperture image is produced with improved along-track resolution. In contrast to conventional side-scan sonar, SAS processing provides range-independent along-track resolution. At maximum range the resolution can be magnitudes better than that of side-scan sonars.

For further reading, the Open Access Article: Introduction to Synthetic Aperture Sonar[1] can be recommended as introduction for people familiar with Sonar Systems. For academics, the IEEE Journal of Oceanic Engineering article: Synthetic Aperture Sonar, A Review of Current Status[2] gives an overview of the history and an extensive list of references for the community achievements up to 2009.

References[edit]

  1. ^ Roy Edgar Hansen (2011), Introduction to Synthetic Aperture Sonar, Sonar Systems, N. Z. Kolev (Ed.), ISBN 978-953-307-345-3, InTech. Open access article, available from: http://www.intechopen.com/articles/show/title/introduction-to-synthetic-aperture-sonar.
  2. ^ M. P. Hayes and P. T. Gough, Synthetic Aperture Sonar: A Review of Current Status, IEEE J. Ocean. Eng., vol. 34, no. 3, pp. 207-224, July 2009. Access abstract.

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